05000348/LER-1980-058-03, /03L-1:on 801007,per Discussion w/NRC,three-yr Containment Tendon Surveillance Revealed Tendon Liftoff Forces & Record Discrepancies.Spring 1981 Surveillance to Be Performed.Rams Calibr Is Suspected as Primary Cause

/03L-1:on 801007,per Discussion w/NRC,three-yr Containment Tendon Surveillance Revealed Tendon Liftoff Forces & Record Discrepancies.Spring 1981 Surveillance to Be Performed.Rams Calibr Is Suspected as Primary Cause

ML19341A828
Person / Time
Site:	Farley
Issue date:	01/23/1981
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341A827	List: 05000348/LER-1980-079-03, /03L-0:on 801108,main Steam Safety Valve 01N11V010B Failed to Meet Tech Spec Lift Setting Requirements.Caused by Setpoint Drift.Valve Adjusted ML19341A826
References
LER-80-058-03L, LER-80-58-3L, NUDOCS 8101280291
Download: ML19341A828 (2)

LER-1980-058, /03L-1:on 801007,per Discussion w/NRC,three-yr Containment Tendon Surveillance Revealed Tendon Liftoff Forces & Record Discrepancies.Spring 1981 Surveillance to Be Performed.Rams Calibr Is Suspected as Primary Cause

Event date:
Report date:
3481980058R03 - NRC Website

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!o12i IIn accordance with our disc"ssiens with the E SMf# cn n-+ & 7. 1900. r% *n11evhl I c 1 a i I s sut:mitted. 1he three-year containment tendon surveillance performed in accordance 3 i

I o l 41 lwith surveillance test procedure #mP-1-STP-609.0 revealed unexpected tendon lift-off 3 10 i s i I orces. In aMMm, discrepancies between tendon installation OC records and "as g

f 3 0 i s i l found" conditions were detected. 'Ihe health and safety of the public were not g

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t i,i j Ifive year surveillance to the Spring of 1981.

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,,,, lthe three year surveillance will have their lifc-off forces checked at that time.

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8101280 W a 9 NA*.tE OF PREPAMR PHONE:

e LER 80-058/03L-1 ATTAChEYr CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

Since the calibration of the rams used in the surveillance test is suspected to be the primary contributor to the lif t-off force anomaly, additional effort will be made to ensure that the calibration is properly performed using approved procedures. Post-surveillance calibration vill be performed and lif t-off data verified prior to the completion of the contract.

To resolve possible discrepancies in documented tendon installation, visual inspections are planned to verify QC records on all tendons which will be tested in Spring of 1981.

Anomalies in lif t-off forces and discrepancies in visual inspections found during the Spring of 1981 surveillance will be evaluated and pro =ptly resolved. The sample size will be appropriately expanded as a result of the evaluation.

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